A two-dimensional single sheet tester incorporating controlled magnetization direction

1996 ◽  
Vol 79 (8) ◽  
pp. 4753 ◽  
Author(s):  
J. J. Dalton ◽  
J. Liu ◽  
A. J. Moses ◽  
D. H. Horrocks ◽  
A. Basak
Keyword(s):  
Two Dimensional ◽  
Magnetization Direction ◽  
Single Sheet

Magnetic quantum oscillations in doped antiferromagnets

2017 ◽  
Vol 31 (25) ◽  
pp. 1745015
Author(s):  
V. V. Kabanov
Keyword(s):  
Magnetic Field ◽  
Polar Angle ◽  
Two Dimensional ◽  
Plane Angle ◽  
Arbitrary Direction ◽  
Magnetization Direction ◽  
Quantum Oscillations ◽  
Out Of Plane ◽  
Plane Direction ◽  
Magnetic Quantum Oscillations

Energy spectrum of electrons (holes) doped into two-dimensional (2D) antiferromagnetic (AF) semiconductors is quantized in an external magnetic field of arbitrary direction. A peculiar dependence of de Haas–van Alphen (dHvA) magneto-oscillation amplitudes on the azimuthal in-plane angle from the magnetization direction and on the polar angle from the out-of-plane direction is found. The angular dependence of the amplitude is different if the measurements are performed in the field above and below of the spin-flop field.

A RAPID GRAPHICAL SOLUTION FOR THE AEROMAGNETIC ANOMALY OF THE TWO‐DIMENSIONAL TABULAR BODY

Geophysics ◽  
1966 ◽  
Vol 31 (5) ◽  
pp. 963-970 ◽  
Author(s):  
R. J. Bean
Keyword(s):  
Inclination Angle ◽  
Geomagnetic Field ◽  
Graphical Method ◽  
The Body ◽  
Two Dimensional ◽  
Half Maximum ◽  
Graphical Solution ◽  
Magnetization Direction ◽  
Maximum Slope ◽  
Magnetic Latitude

A graphical method of determining the depth and other parameters of two‐dimensional tabular bodies by analysis of aeromagnetic anomalies is outlined. The method uses the inflection and half maximum slope points of anomalies having either two flanks or a single high gradient. Ratios of distances between these points are used to obtain a solution. The problem is simplified by combining angles of dip, magnetization direction and the inclination of the geomagnetic field in the plane of the profile into an apparent inclination angle. By use of the graphs, the depth, width, and apparent inclination angle can be determined rapidly from only a few simple measurements, so the method is especially suited for rapid interpretation of large aeromagnetic surveys by use of the observed profiles. Graphs are also given for locating the center or edge of the block, and the product of the intensity of magnetization and the dip of the body can be obtained by utilizing the maximum slope of the anomaly. By use of alternate values of the apparent inclination angle, the method can be used for any direction of magnetization at any magnetic latitude.

Optimization of Two-Dimensional Rotational Single Sheet Tester

2019 ◽  
Author(s):  
Yan Zhang ◽  
Jiang Zhao ◽  
Le Wang ◽  
Youguang Guo ◽  
Zheng Li ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Single Sheet

scholarly journals Helical phase in two-dimensional magnets due to four-spin interactions

2021 ◽  
Vol 2086 (1) ◽  
pp. 012165
Author(s):  
G R Rakhmanova ◽  
D I Ilin ◽  
A N Osipov ◽  
I V Shushakova ◽  
I V Iorsh ◽  
...  
Keyword(s):  
Free Energy ◽  
Energy Density ◽  
Fourth Order ◽  
Point Group ◽  
Free Energy Density ◽  
Ferromagnetic State ◽  
Unit Vector ◽  
Two Dimensional ◽  
Local Magnetization ◽  
Magnetization Direction

Abstract We demonstrate that in ferromagnets with the D3h point group of symmetry a possible origin of phase transition from a collinear ferromagnetic state to a non-collinear state can be the fourth order contributions to the free energy density that are allowed by this point group of symmetry. At the same time, Dzyaloshinskii-Moria interaction vanishes in such materials. Via symmetry analysis we derive seven possible fourth order contributions to the free energy density with respect to the unit vector of the local magnetization direction but only two of them can be considered as independent. Moreover, for two-dimensional systems only one survives. Considered symmetry class is essential because a large group of two-dimensional intrinsic ferromagnets belongs to it, for example a monolayer Fe3GeTe2. The four-spin chiral exchange does also manifest itself in peculiar magnon spectra and favors spin waves.

Transformation of nonlinear problems into linear ones applied to the magnetic field of a two‐dimensional prism

Geophysics ◽  
1989 ◽  
Vol 54 (1) ◽  
pp. 114-121 ◽  
Author(s):  
João B. C. Silva
Keyword(s):  
Linear Problem ◽  
Least Squares Method ◽  
Synthetic Data ◽  
Nonlinear Problems ◽  
Parameter Estimate ◽  
Initial Guess ◽  
Horizontal Position ◽  
Two Dimensional ◽  
Magnetization Direction ◽  
Discrete Values

I present a magnetic interpretation method which transforms into a linear problem the nonlinear problem of obtaining the geometric and position parameters of a two‐dimensional vertical, infinite prism. The magnetization, the only linear parameter, becomes nonlinear after the transformation. By assuming a few discrete values over a prescribed interval for the magnetization, I obtain several solutions for the geometric and position parameters. By storing only the extreme solutions, bounds for each parameter are produced. The method was applied to synthetic anomalies due to isolated and interfering sources for which robust alternatives performed better than the least‐squares method. The correlation between the magnetization and the prism width is the most important factor controlling ambiguity of parameters. The horizontal position is the least affected parameter, followed by the depth to the top of the prism. Application to a real anomaly confirmed the results from synthetic data, except for a greater uncertainty in the estimation of the horizontal position. The uncertainty results from the requirement in the present method that the observations be reduced to the pole; an imprecise knowledge of the magnetization direction distorts the position, which is highly correlated with the magnetization inclination. Because the estimation of the position, depth, and width is transformed into a linear problem, the method is simple, fast, and independent of the initial guess. The method might, therefore, be useful in automatic interpretation of basement relief. By producing bounds for each parameter estimate, an analysis of parameter precision and ambiguity is also possible.

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